I have a lot of experience with this as I grew up in Brazil and started BJJ competitions around age 7. As you can imagine I’ve spent MANY hours of my life jumping rope and these are the conclusions I’ve reached — to those that don’t jump rope often (can’t do 3x5min without missing, or 10min straight, 15min straight, etc) the exercise itself will feel way more like intensity conditioning training than cardio. If you want to get faster, more explosive, jump higher, I definitely recommend you getting good at it, and honesty it’s pretty fuckin easy so within a day or two I imagine you’ll be getting 1-2min without messing up and from there it only gets better. On the other hand, you say you wanna bulk while keeping a healthy heart, the easiest way to do this without having your cardio keep you from bulking (I’m judging from your picture that you have a hard time putting on weight), is to do some low-intensity long periods of cardio. It worked the best for me, maybe other guys here will have some other ideas that may work better for you.
-LB